<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        #wrapper{
            background:#000 url("res/welcome.jpg") no-repeat center;
            background-size:100% 100%;
            width: 1000PX;
            height: 600PX;
        }
    </style>

    <link rel="stylesheet" href="res/bootstrap.min.css"/>
    <script src="res/jquery-1.13.0.min.js"></script>
    <script src="res/bootstrap.min.js"></script>
</head>
<body>

<div class="container" id="wrapper" style="position:absolute;left:100px; top:10px">

    <a class="btn btn-success" style="border: none;font-size: 40px;position:absolute; top: 272px; left:300px; width: 390px; height: 60PX;background-color: #C10569" href="round_1.html">来抽奖吧</a>
</div>

</body>
</html>